| Acronym | Meaning |
| ETA | A Hydrostatic Model That Employs The Eta Vertical Coordinate |
| ACA | Atmospheric Chemistry Of Aerosols |
| PCAS | Passive Cavity Aerosol Spectrometer |
| LES | Large-eddy Simulation |
| OWRR | Office Of Water Resources Research |
| CASS | Computer-Assisted Surveillance System |
| M-SRI | Stanford Resource Institute |
| ACFM | Alternating Current Frequency Modulation |
| AQD | Atmospheric Quality Division |
| OAS | Organization Of American States |